Response of HF Radar to Meteor Backscatter Detection

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Authors
  1. Thayaparan, T.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The response of High Frequency (HF) and Very High Frequency (VHF) radar systems to echoes from underdense meteor trails is numerically calculated. A comparison is made at radar frequencies of 5, 15, 25 and 40 MHz based on standard echo theory. This theory takes account of the initial radius of the trail, the finite formation due to the meteor velocity, and the diffusion in the time between radar sweeps. Height distributions of underdense meteor echoes are predicted based on standard theory as a function of radar frequency. The importance of data processing scheme is highlighted in order to detect underdense meteor echoes at different radar frequencies. The strengths and drawbacks for radar detection of meteors at a low frequency are discussed.
Keywords
Radio Wave Backscatter;Sporadic meteors;Shower meteors;Underdense;Overdense;Specular reflection;Ambipolar diffusion;Decay Time Constant;Initial radius;Finite velocity;Pulse Repetition Frequency;Attenuation Factor;Fresnel Zone;Mean winds;Sampling Time Interval
Report Number
DREO-TR-1999-100 — Technical Report
Date of publication
01 Oct 1999
Number of Pages
55
DSTKIM No
CA000274
CANDIS No
512282
Format(s):
Hardcopy;Document Image stored on Optical Disk

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